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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '698d9b69d51e7d1333009da515c6bde8dbb9b6f183ac813ceb2e33c4e4654b77' 
  AND token = '6U9Y8dgOWdZdan8hSCHZc1t6CFvx/JyliR63ZrJqTSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}